Let’s check out the performance of other arrays:
Just like in case of linear workload, the performance of RAID1 and RAID10 arrays is higher than that of a single HDD and RAID0 array of two HDDs correspondingly in test modes with high reads share. In test modes with higher writes share this performance is lower. Of course, RAID1 and RAID10 are faster in modes with higher reads share due to intellectual selection of the optimal hard disc drive from the mirrored pair.
And as for RAID5, the situation again leaves much to be desired. The four-HDD array is faster than a three-HDD array only when the read requests are dominating. As the share of writes picks up, these two arrays level out and then the one with more HDDs falls behind.
As the workload increases to 256 requests, nothing really changes about the arrays performance. At the same time, the performance of RAID0 arrays in RandomRead mode indicates with all certainty that this controller supports TCQ.